Ticking/knocking noise - Timing belt?

[skeeo]

Hi all,

Long time lurker, first time poster, love my daewoo lanos!

Anyway, i've noticed in the last few hundred miles that i've been driving the car, its started to develop abit of a knocking noise. It sounds more like *duck duck duck duck*. It only happens when the car is really cold and at low rpms.

Was just wondering if this had something to do with the timing belt?

My lanos is now at around 60000 miles and hasn't ever had a timing belt change. Is that knocking/ticking noise a symptom that it requires changing?

Or is it something else?

[duncsta]

maybe a sticky lifter but do get a timing belt change its due, my a16dms sometimes does it when its low on oil (not by much) also how good is the oil it may be breaking down

[MMamdouh]

if timing belt is due for a change then don't delay it

try an oil change with engine oil flush product... might be a dirty lifter or so

MMamdouh

[Big Jeff]

if timing belt is due for a change then don't delay it

MMamdouh

do the water pump and tensioners at the same time

[smokingbarrel]

Hey everyone, I encountered a similar problem on my mom's car about 2 weeks ago. She has Lanos S 2000.
She did the oil change and on the next day we had an intense 50 miles long trip (this car is usually not used on freeways). On the next day the car started out as usual, but after driving a couple of blocks, it started making a strange noise. The noise appeared to be from the front right wheel area (that's where the belts are), but it is hard to tell whether it was coming out directly from the engine. The noise is high pitch and it is similar to a tiny twig is beating against the metal exterior. The noise is very distinctive when the engine is running on low rpm. The car performance is not affected at all - it runs and behaves the same as before.

We took our car to our regular mechanic who is a honda/acura specialist. He pored some oily thing into the engine and asked me to drive several times around the bloc. On the second round the noise almost disappeared, but when I stopped accelerating it came back. I left this car for 2 days during which the mechanic checked the timing belt and some other stuff as far as he could reach without taking major things apart. He couldn't find the problem and recommended me to find someone who specializes on Korean cars.

Can anyone suggest where is the problem?

[smokingbarrel]

by the way, the car is only 46K miles.

[Big Jeff]

if it's a rattle/grindig/tickig noise if will problemly be the water pump berrings (i am NOT saying it is)

has the car had a service done to the engine e.g. timing belt, tensioners etc

i had the same noise and mine turn out to be the water pump

hope this help's

Jeffrey

[gse_turbo]

this goes for the bolt of you...

...like Jeff said, do the timing belt, water pump AND the pulleys, don't leave them out as most do. this will wear on the belts more.

what it sounds like is either the water pump as Jeff mentioned or the belt itself. I'm leaning more to belt because typically the pump would have a consent whine or grind. I think it may be that a part of the belt has torn away and is slapping the timing cover.

there are two things you can do...
#1 would be to remove the top half of the timing cover, disconnect the coil pack and crank over the car. this will let the motor turn over so you can see the complete belt.
#2 would be, buy an automotive stethoscope. they have a long steel rod that you can point at things while the engine is running to see exactly where the sound is coming from.

both are very simple, just about anyone can do either.

good luck.
Garrett

[smokingbarrel]

Thanks guys,
We might onto something. The mechanic said that water pump is leaking... So it might be it. For a past year we've been noticing that the coolant level drops a lot. Also I discovered that the top surface of the coolant tank was covered with a thick layer of muddy substance which happened to be oily as well.

The car was had a 36K miles service and that's all. We never replaced timing belt because it should be done at 96K miles (this procedure costs the same price as the car itself in Bay Area).

[Pir0]

If you're loosing lots of water and there's gunk in the water bottle you might have head gasket failure. Take off your oil cap and look at the underside of it, if there's any creamy bits in the oil you might be a bit screwed.

[Spider]

Hi all,

Long time lurker, first time poster, love my daewoo lanos!

Anyway, i've noticed in the last few hundred miles that i've been driving the car, its started to develop abit of a knocking noise. It sounds more like *duck duck duck duck*. It only happens when the car is really cold and at low rpms.

Was just wondering if this had something to do with the timing belt?

My lanos is now at around 60000 miles and hasn't ever had a timing belt change. Is that knocking/ticking noise a symptom that it requires changing?

Or is it something else?

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
EDIT: Just read the rest of the thread here and yes it could be a water-pump problem. Especially if its leaking and or frozen up.. Is your engine overheating ? Also read Gse Turbo's comments too..
So Skeeo ? You best start with the obvious....
Anyway, my following original response is still worth reading..at least I think it is....

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Hey Skeeo,

My vote is for "something else"
Could be one of a few things.. But I highly doubt it's the timing-belt that's making the noise or causing it.
And...
YES! to everything everyone has responded to you in regard to installing a new one (w/new water-pump, pulley and tensioner) is right on !!! Anything after 60k miles and it's only a matter of time before your t.belt looses teeth and or snaps!
If it snaps your looking at a lot of work and money.
So, yes it's time for a replace on that.
Maybe you need to try and isolate the engine noise first though? If me? I would do that and gamble that the belt won't snap while I do..
But that is your call Skeeo.

I don't think the sound is related to the t.belt issue though.
If it's a deep "KLUNK" noise.. not good !... could be a crankshaft knock.
If it's a more rapid "knock" it could be a rod knock and or piston 'slap.
Note I am saying "could be" on all of this because I can't hear it.
If I could? I could pin-point it.
Do you have a "Harbor-Freight Tools" near you? If yes? Buy a mechanics stethoscope, cheap (under$10 dollars usd) and an excellent investment. You can play doctor w/it and find the general location of your noise.

Also, as suggested, do a fresh oil/filter change.. rapid."ticking" indicates a stuck lifter. So when you do the oil change add 6 ounces of regular old red ATF to it.. or you can use "Marvel Mystery" oil too.

Please keep us posted.


P.S. my wife just had the t.belt, tensioner, pulley and water-pump replaced in her 07 Hyundai (very simular to the woo) it cost under $400.00 usd parts and labor. Bakersfield Ca.